I know this is mostly a preference quesiton and different preamps work better with different sources, but I'm hoping to at least be guided in the right direction. I'm looking for a two channel preamp used almost exclusively on heavy distorted guitar (Mesa half stack and Gibson Les Pauls mostly) and vocals. I'm using an M-Audio Audiophile 192 HD, and have a Blueberry, Audio Technica 4050, Groove Tubes GT-55, Sennheiser e-609silver, Oktava MK-012, 57s, and 58s if that helps any. I don't need any bells and whistles like compressors, EQ, etc, and my budget is roughly $300-500. Thanks for any help.